Patents by Inventor Carl W. Carroll

Carl W. Carroll has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Portable electric heating apparatus for supplying heated dry non-flammable gas to an applicator gun
    Patent number: 5214740
    Abstract: An apparatus for electrically heating non-flammable gases, supplied to an applicator gun comprises an elongated housing having an elongated electric heater located centrally and longitudinally therein and a metallic helically coiled tube spaced from and surrounding the heater. The coiled tube is substantially co-extensive in length with the heater and has an inlet end and an outlet end connectable to an applicator gun. An elongated preheating tubing section is disposed length-wise of and surrounded by the helically coiled tube in spaced heat exchange relation with the electric heater. The preheating tubing section has an inlet end connectable to a supply of non-flammable gas and an outlet end connected to the inlet end of the coiled tube.
    Type: Grant
    Filed: January 31, 1992
    Date of Patent: May 25, 1993
    Inventor: Carl W. Carroll